
human building for ai agents | @agentphonehq
Joined October 2024
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we applied to @ycombinator a month late. got an interview in 2 days. here's the demo video that did it:
"make shitposting multiplanetary" - 𝕏 is in good hands
I’m joining the team at @X to lead Product.
I am a huge believer in @SpaceX's mission to extend human consciousness to the stars, so it’s time to make shitposting multiplanetary.
X is the best way to find out what’s happening in the world right now and talk about it. The team has been working tirelessly to make X a better place and product for the people who love it, and many have noticed the recent momentum. My goal is to help accelerate that momentum for our community, new users, and businesses globally by continuing to make this product beautiful and useful.
We are twenty years in, but it truly feels like X’s next chapter will be our greatest. I look forward to your ideas and feedback; I’m sure the replies will be measured and magnanimous.
Meet Modi retweeted
100+ YC companies are now actively using @AgentPhoneHQ
pretty insane seeing other founders use something my brother and I built
if you're building a startup with AI agents that need to call or text, come build with us
it’s obvious i’m telling you
Greg Isenberg sold his first startup to StumbleUpon at 24, eleven months after launching it. His new list has 39 startup ideas, and at least three of them already have funded companies behind them.
The formula is simple: take a brand everyone knows and add "for agents." Okta for agents. Geico for agents.
So I checked.
Twilio for agents is AgentPhone (@AgentPhoneHQ), from Y Combinator's (@ycombinator) Spring 2026 batch. One API call gives an AI agent its own US or Canadian phone number for calls and texts. Teams at Replit and LangChain are already building on it, per its YC page.
Okta for agents shipped on October 15. Descope (@descopeinc) released Agentic Identity Hub 3.0, where every internal agent gets an approval process, an accountable owner, least-privilege access and an audit trail. Developers on its free tier can use the core hub today.
Geico for agents is closer than it looks. Corgi (@UseCorgi), YC Summer 2024, became a licensed full-stack insurance carrier in July 2025. Its startup coverage list puts AI liability right next to D&O and cyber. It passed $40M in ARR, then raised a $160M Series B led by TCV at a $1.3B valuation in May 2026.
So the ideas hold up, and the clock on them is already running.
Greg (@gregisenberg) knows this game from the founder side. In October 2012 he launched 5by in Montreal, a video app that picked short clips for your mood and the time you had. In September 2013 it became StumbleUpon's first acquisition, and the six-person team moved to San Francisco. StumbleUpon was co-founded by Garrett Camp (@gc), who went on to co-found Uber.
Then came Islands, a community app for college campuses that WeWork acquired, and he stayed on as WeWork's head of product strategy. In June 2020 he started Late Checkout (@latecheckoutplz), a holding company that builds and buys internet businesses. One of them, Ideabrowser, is software for finding startup ideas.
His own count, on his website: "probably another 100+ things that went nowhere."
That line is the real advice inside the list. The founders building these ideas in 2026 picked one and shipped it, with real users before the list was posted.
The best idea on the list is the one somebody already raised on.
xitter.cf/gregisenberg/status/21…
Meet Modi retweeted
A quick video of Phonedex working via @AgentPhoneHQ’s SIP trunk. Still finding ways to improve it all the time, but it’s coming along very nicely as it is so far.
@themeetmodi @manav2modi
despite the unfortunate timing, we take disclosures seriously at @typesafeai
at approximately 6:49PM this Friday evening, we became aware of a massive unauthorized leak of ALL customer noul outputs
in effort to maximize transparency, here is the link: gist.github.com/diogo149/810…
The MOST obvious (but REALLY good) STARTUP ideas right now:
1. Zestimate for company data (what your data is worth to an AI lab)
2. Google Analytics for agents (see which agents visit your site and what they want)
3. Y Combinator for 1 person companies (back solo founders running a team of agents)
4. Okta for agents (who each agent is and what it's allowed to touch)
5. Marie Kondo for your company's data (clean it up so agents can use it)
6. FICO for agents (a trust score before an agent can spend money)
7. Geico for agents (insurance for when an agent makes an expensive mistake)
8. Datadog for agents (see every step your agents took)
9. Twilio for agents (phone numbers and texting for agents)
10. Upwork for agents (hire an agent for a job instead of a freelancer)
11. ESPN for AI (every model launch covered like a big game).
12. Shutterstock for robot training videos (get paid to film yourself doing chores)
13. Credit Karma for what AI knows about you (see it, fix it, delete it)
14. Norton for AI scams (protect your parents from fake voices and emails)
15. PayPal Buyer Protection for agent purchases (fixes it when your agent buys the wrong thing)
16. Geek Squad for AI (set up personal agents for families and small businesses)
17. Dell for private AI (AI in a box for firms that won't use the cloud)
18. Carfax for used GPUs (a health report before you buy secondhand)
19. Airbnb for idle GPUs (rent out computing power you're not using)
20. Rotten Tomatoes for AI models (real reviews instead of benchmarks)
21. G2 for skills (find the best skills for your agent)
22. Dropbox for your AI memory (take what your agent knows about you to any agent)
23. Canva for physical products (design it with AI and get it made)
24. ADT for your personal agent (alerts when your agent does something it shouldn't)
25. Hertz for robots (rent one for a move, a deep clean or an event)
26. Harvard Business School for internet businesses (a real education in building online)
27. Workday for agents (onboard, manage and offboard your digital workers)
28. Getty Images for your face and voice (license your likeness to AI safely)
29. Meta Muse for older adults (and other high LTV niche)
30. Google Ads for agents (pay to be what the agent recommends)
31. Loom for agents (a walkthrough of everything your agent did)
32. Plaid for agents (approved access to banks, airlines and stores)
33. Jiffy Lube for vibe coded apps (quick fixes when your AI built app breaks)
34. Ancestry for datasets (where your training data came from)
35. The organic label for human-made content (proof a person made it)
36. Strava for builders (track what you ship every week)
37. Honey that haggles for you (your agent negotiates the price)
38. SEM Rush for personal agent platforms (like Muse etc)
39. Frequent flyer miles for agents (loyalty programs built for agents)
this team is cooking
Introducing Probe: The Agent-Native Research Stack.
Our goal is simple: help AI/ML teams run better experiments, faster.
Teams run research with agents now, but their work is disordered. They lose hours verifying what their agents actually did, managing environments and compute, and re-explaining company context their agents should already know.
So we rebuilt the research stack from the ground up for agent-driven research.
Probe brings core research tools, shared context from past experiments, and visibility into each run together in one platform.
Teams can spend less time setting up infrastructure, supervising agents, and catching teammates up, and more time testing ideas.
If you’re a research lab, scale your research team without sacrificing speed.
If you’re an AI/ML team, stand up a research capability with the infrastructure of a frontier lab.
See Probe for yourself: useprobe.ai/
get your @Muse a phone number with @AgentPhoneHQ today!
no one tell him about @AgentPhoneHQ 🤫
building an iMessage assistant for personal use
confused between @thelinqapp and @PhotonHQ for the messaging layer
anyone who's used either? what would you recommend?
Every week someone tells me they’re going to vibe-code their own @AgentPhoneHQ alternative over the weekend.
I wish them luck, here’s the list of things to expect:
> excruciating pain
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